The calculated distance (air line) between Rosh Ha‘Ayin and Nahariyya is approximately 64 miles respectively 102 kilometers.
By car or train, the actual journey to Nahariyya is certainly longer, as only the direct route (as the crow flies) between Rosh Ha‘Ayin and Nahariyya has been calculated here.
Air line (approximately)
102 kilometers
55 nautical miles